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 $DC05/56325/CIA1+5:   Timer A High-Byte (Kernal-IRQ, Tape)

   Read : Get current value
   Write: Set High-Byte of value to count down from

   Default Value: $40/64 on PAL
                  $42/66 on NTSC

Kernal-Reference:

 STA $DC05   : <A HREF="ROMF8E2.HTM">$F90E</A> <A HREF="ROMFDDD.HTM">$FDF3</A>

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